Knowledge Management System Of Institute of metal research，CAS
| Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings | |
| Guo, H.; Wu, N. C.; Zhang, Y. L.; Zhang, S. D.; Sun, W. H.; Wang, J. Q. | |
| 2020-05-25 | |
| Source Publication | SURFACE & COATINGS TECHNOLOGY
 |
| Volume | 390 |
| Abstract | The impact behavior of Fe-based amorphous coatings with various thicknesses fabricated by high-velocity-airfuel thermal spraying was systematically investigated via 3D X-ray tomography. The results showed that the impact damage occurred principally by cracking in the coating, plastic deformation in the substrate, and delamination at the coating/substrate interface. It was found that the size of the interfacial delamination was a nonlinear function of the normalized coating thickness t(c)/a (i.e. the ratio of coating thickness (t(c)) to the contact radius (a)). Three thickness regions of distinctive damage modes were identified: thin coating region (t(c)/a <= 0.33), intermediate-thickness region (0.33 < t(c)/a <= 0.54), and thick coating region (t(c)/a > 0.54). For t(c)/a <= 0.33, no delamination appeared in the coating/substrate interface. With an increase from t(c)/a = 0.33 to t(c)/a = 0.54, the extent of interfacial delamination increased quickly and reached a maximum. Finally, when t(c)/a > 0.54, the extent of delamination decreased when t(c)/a increased. In addition, it was indicated that the residual stress was found to decrease with the coating thickness, reflecting that the residual stress was excluded as a predominant factor of impact damage. Furthermore, a good agreement with the Hertz impact theory and finite element modeling was identified in the case of interfacial damage: significant delamination was observed in the 600 mu m coating when the maximum shear stress occurred close to the coating/substrate interface. This finding can be used to assist the design of coated components in load-bearing applications. |
| DOI | 10.1016/j.surfcoat.2020.125650 |
| WOS ID | WOS:000532675100003 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/82832 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Guo, H.,Wu, N. C.,Zhang, Y. L.,et al. Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings[J]. SURFACE & COATINGS TECHNOLOGY,2020,390. |
| APA | Guo, H.,Wu, N. C.,Zhang, Y. L.,Zhang, S. D.,Sun, W. H.,&Wang, J. Q..(2020).Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings.SURFACE & COATINGS TECHNOLOGY,390. |
| MLA | Guo, H.,et al."Influence of coating thickness on the impact damage mode in Fe-based amorphous coatings".SURFACE & COATINGS TECHNOLOGY 390(2020). |
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